Verified
Sekova FA-II Fuzz
Check out Tonemachines blog post for this 1969 japanese beauty. Apparently, this is exactly the same circuit that can be found inside Apollo Fuzz and Crestwood Fuzz boxes… The circuit uses “positive ground” with PNP Ge transistors. Mind the power supply or use a charge pump. Now verified. Different transistor models/individuals will affect the output … Read more
HBE Hematoma
You bassists on here are pretty speedy builders, so who will build this first? :o) At 22 x 14 this will fit in a 1590B if you file the sides down a bit, but with it being a two stomp effect you’ll probably want to put it in a 1590BB or at least a 125B … Read more
Arion MMP-1 Metal Plus
Here’s something cool. The design reminds me of something else a lot – i think some of you may want to take the diodes on a switch with red 3mm LEDs 🙂 Original unit has NEC C157C metal can IC in it, but NEC’s own cross reference guide says that this particular IC has been … Read more
Ibanez STL Super Tube
Doron! I think you meant this one and not the MSL 😛 To add a few words, the clipping diodes are placed neatly where you can easily take them on the switch and have your way with them. I would probably go with three position two pole switch and have the middle as diode lift, … Read more
DOD Overdrive Preamp 250 Reissue
Got an early 90s unit recently, the chinese reissue with JRC4558 chip. I’m still really surprised how good it sounds. So i do think this is very neglected and underrated pedal. I’ve added polarity protection diode and pulldown resistor for the input. The chip is stated as KA4558 in the italian reissue schematic i found … Read more
Banzai Coldfusion
Request. Hmmm, I’m spotting a few similarities to something else here! :o) But true bypass switching and so without the famous buffer. It does have a lot of changes though and some of them will undoubtedly make a difference and affect the final tone, so worth a build for you Klon fans. Note the two … Read more
Nobels DT1 Distortion
Not too much info around on this beloved cheapo pedal, but it seems to be of fairly good design. For the layout, i’ve omitted the input buffer to keep the size down. The output buffer has 2SK30-style pinout for couple of reasons. First, the original (schematic states K222E) is not that common. Second, it’s just … Read more
Knight KG389 Fuzz Box
Originally sold as a kit, this seems like a nice adaptation of Sam Ash/Astrotone fuzz. Not sure about the original transistors, but my best bet would be on the 2N2222 and other relatively low gain devices. Original also has 50n caps, but i think most of you have stock of 47n caps… Andrea notes on … Read more